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- W2616111570 abstract "In assessing the risk an asteroid may pose to the Earth, the asteroids state is often predicted for many years, often decades. Only by accounting for the asteroids initial state uncertainty can a measure of the risk be calculated. With the asteroids state uncertainty growing as a function of the initial velocity uncertainty, orbit velocity at the last state update, and the time from the last update to the epoch of interest, the asteroids position uncertainties can grow to many times the size of the Earth when propagated to the encounter risk corridor. This paper examines the merits of propagating the asteroids state covariance as an analytical matrix. The results of this study help to bound the efficacy of applying different metrics for assessing the risk an asteroid poses to the Earth. Additionally, this work identifies a criterion for when different covariance propagation methods are needed to continue predictions after an Earth-encounter period." @default.
- W2616111570 created "2017-05-26" @default.
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- W2616111570 date "2017-06-01" @default.
- W2616111570 modified "2023-09-27" @default.
- W2616111570 title "Assessment of the Gaussian Covariance Approximation over an Earth-Asteroid Encounter Period" @default.
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- W2616111570 hasPublicationYear "2017" @default.
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